body, html {
  max-width: 450px;
  margin: 0 auto;
  min-height: 100%;
  background: #efeff4;
}
body {
    line-height: 1.6;
}

.weui-btn {
  width: 90%;
  height: 37px;
  text-align: center;
  line-height: 37px;
  margin: 20px auto 0;
  color: #fff;
}